:root {
  --navy: #0f2744;
  --orange: #e8622a;
  --green: #2ea057;
  --muted: rgba(255, 255, 255, 0.75);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: #0a1628;
  color: #fff;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
}
header {
  background: rgba(15, 39, 68, 0.95);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0.85rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--orange), #f4a261);
  color: var(--navy);
  font-weight: 800;
  display: grid;
  place-items: center;
}
header h1 {
  margin: 0;
  font-size: 1.05rem;
}
header p {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}
.badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(232, 98, 42, 0.25);
  color: #ffb347;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
}
.tabs {
  display: flex;
  gap: 0.35rem;
  padding: 0.5rem 1.25rem;
  background: rgba(15, 39, 68, 0.6);
}
.tab {
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
}
.tab.is-active {
  background: var(--orange);
}
.layout {
  display: grid;
  grid-template-columns: 1fr min(340px, 36vw);
  min-height: 0;
}
.main-col {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.panel-view {
  padding: 0.65rem 1.25rem;
  background: rgba(0, 0, 0, 0.25);
  font-size: 0.85rem;
}
.panel-view.is-hidden {
  display: none;
}
.panel-hint {
  margin: 0;
  color: var(--muted);
}
.upload-box h2 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}
.upload-box p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.85rem;
}
#upload-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.btn-primary {
  background: var(--orange);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
}
.upload-status {
  margin: 0.65rem 0 0;
  font-size: 0.85rem;
}
.upload-status.error {
  color: #fca5a5;
}
.upload-status.ok {
  color: #86efac;
}
.uploaded-list-wrap {
  margin-top: 1rem;
}
.uploaded-list-wrap h3 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}
.uploaded-list-wrap ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.82rem;
}
.uploaded-list-wrap button {
  background: none;
  border: none;
  color: #ffb347;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
  font: inherit;
}
.course-wrap {
  flex: 1;
  background: #000;
  min-height: 280px;
}
iframe {
  width: 100%;
  height: 100%;
  min-height: 55vh;
  border: none;
  display: block;
  background: #fff;
}
.record {
  background: #f7f4ef;
  color: #222;
  padding: 1.1rem;
  overflow-y: auto;
}
.record h2 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--navy);
}
.record .intro {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  color: #555;
}
.stat {
  background: #fff;
  border-radius: 10px;
  padding: 0.75rem;
  margin-bottom: 0.55rem;
  border: 1px solid rgba(0, 0, 0, 0.06);
}
.stat label {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  color: #777;
}
.stat span {
  font-weight: 600;
}
.stat.complete span {
  color: var(--green);
}
.course-title {
  margin: 0.75rem 0 0;
  font-size: 0.8rem;
  color: #555;
}
footer {
  padding: 0.65rem 1.25rem;
  background: rgba(15, 39, 68, 0.95);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  cursor: pointer;
}
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
}